High Performance Dye-Sensitized Solar Cells Based on Thermal Deposition Pt Counter Electrodes

In this work, the vacuum assisted thermal deposition platinum (Pt) film was prepared and used as a counter electrode (CE) in dye sensitized solar cell (DSC). The films were characterized by scanning electron microscopy (SEM). Electrochemical catalytic activities of the films were also characterized by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The effects of the Pt loading amount on the fluorine-doped tin oxide (FTO) glass and titration time on the performance of the DSC were investigated. The optimal performance of the DSC was obtained when using the three-time titration with 1.69 mg/cm(2) Pt loading amount vacuum assisted thermal deposit CE. The DSC showed a high efficiency of 7.20%. The short-circuit current density (Jsc), open circuit voltage (Voc) and fill factor (FF) were 13.79 mA.cm(-2), 0.73 V and 0.71, respectively.